Door-lock



' E. E. L. MONTELIUS.

DOOR LOCK.

APPLICATION FILED MAY 6,1919.

Patented Sept. 7, 1920.

2 SHEETS-SHEET 1- INVNTOR ZrmsZZ'L.Ws, BX YQ \P g ,4 NOR/Hi2 E. E. L. MONTELIUS.

DOOR LOCK.

APPLICATION FILED MAY 6, 1919.

Patented Sept; 7,1920.

2 SHEETSSHEET 2 7 I Hum/70R EWMZEL, Jfoflieliu II II llv ll WITNESSES A TTOH/VEYS UNITD ERNST E. L. MO NTELIUQ, OF NEW YORK, N. Y.

DOOR-LOCK.

Specification of Letters Patent. 7 Patented 7,1920.

Application filed May 1919. Serial n6. 295,178.

T 0 all whom it may concern Be it known that I, ERNST E. L. MorirELrUs, a subject of the King ofSweden, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Door-Lock, of which the following is a' full, clear, and exact description.

This invention relates to a door lock, and pertains more particularly to a lock used in connection witha dumb-waiter shaft.

It is a well-known fact that-considerable difficulty has been experienced, particularly in apartment houses and hotels, through'the throwing of waste down dumb-waiter-shafts. To eliminate this objection, I have devised a lock adapted for use in connection with the doors of dumb-waiter shafts which will render such doors incapable of being opened unless operated by a person in charge who would be in the basement of the building.

A further object of the invention is to provide means associated with the lock, which would prevent the unlocking of any doors other than those to the rear of which the dumb-waiter is positioned.

It will be understood that by accomplishing these results, the danger incident to health and fire is eliminated from apartment houses in which, as aforesaid, it is quite a common practice to throw waste down dumbwaiter shafts. I w a Reference is had to the'attached sheets of drawings which illustrate one practical embo'diment of my invention, and in which.

Figure 1 is a side elevational view of one of the individual door locks; V

Fig. 2 is a plan view showing certain parts in section, both Figs. 1 and 2 representing the device in locked position;

Fig. 3 is a view similar to Fig. 1, with the device in unlocked position;

Fig. 4 is an end view of the compound adjusting clamp; r N

Fig. 5 is a side view of the device illustrated in Fig. 4, and. J

Fig. 6 illustrates a dumb-Waiter shaft to which individual locks are applied to the several doors, and i Fig. 7 is a detail of certain of the parts.

In these various views, like reference numerals designate similar parts, and the reference numeral 1 indicates the side wall of a dumb-waiter shaft, which is provided with openings normally closed by doors 2. Movable in a vertical plane in the shaft, is the usual dumb-waiter carriage 3, suspended therein by means of a cable, such as 4L, passing over drums 5 and thence to a source of power. Each door 2 has applied to its innerface, a keeper 6, formed with the usual conventional inclined face. I

Secured to each door j amb is a supporting bracket 7 carrying the casing 8 at its outer end. The casing 8 is open at its ends and has rotatably mounted within p it, a coinpound adjusting clamp including stems 9 tively,'-are mountedupon either side of the 'main body portion '10, and all three of these elements are formed with corresponding grooves so that the device assembled preintegral with the central body portion110. The front and back'plates 11 and 12, respecportion and its front and back plates, and

a nut 18 engagin' 'the screw-threads formed upon the bolt. i U-shaped latch 19 has its legs. mounted-within the compound clamping member, its upper end extending above and normally engaging the keeper 6. f

"A fork 20 having the outer ends of its prongs bent outwardly as indicated at 21,

has the body portion of its prongs extend- .ing through the channels 14 and 16 of the compound clamping membenthe point of joining of said prongs extending to the rear of the clamping'member. j

' Slidably mounted to one side of the casing S and within a separate portion of the same,

is an arm 22, whichis normally held forwardly bymeans ofa spring 23, extending between the casing'8 and the innermost end of the arm 22. The arm 22 is-benttoward the fork 20, as indicated by the reference numeral 24, and extends in front of said each of the levers 25, and are adapted to be engaged by the sides of the lever 26, when the same is locked either upwardly or downwardly. I

Reference being had to Fig. 7 it will be seen that shouldthe lever 26 be locked upwardly or downwardly the pins 27 will be engagedand moved, and consequently result in a swinging of one of the levers 25.. Now by virtue of the fact that the lower ends of the levers 25 are provided with interengag-'"' ing gear teeth 25", a swinging of both levers will result, as has been clearly shown in Fig. 3, for a purpose hereinafter more fully specified.

A buffer wheel .30 is revolubly secured upon the lever 26, by means of an axle 31, and the outer ends of the levers 25 are provided with inwardly-extending guides, such as 32, for a purpose hereinafter specified. A cord, such as 33, extends the entire length of the shaft, and is provided with a support for its upper end, permitting reciprocation of said cord. This reciprocation is provided for by means of a mounting for the end of the cord 32, which may take the form of a plate 34, on the upper surface of which there is mounted a spring 36, whose upper end engages an enlarged portion of the cord, the upper end whereof projects through the plate 34;.

The body'of the cord 33, as aforesaid, extends throughout the entire length of the shaft, and passes through the guides 32 as clearlyshown in Figs. 1, 2 and 3, said cord being provided between each pair of guides 32, with an enlarged portion, which takes the form of a pair of hemispheres 37,

clamped together by means of a screw 38.

In operation it will now be appreciated that the doors 2 cannot possibly beopened considering that the dumb-waiter is at the lowermost portion of the shaft, but upon the same being elevated to the position indicated in Fig. 6, it will be seen that the buffer wheel 30 will be engaged by the side wall of the dumb-waiter 3, and the levers 25 will be swung inwardly by virtue of this engage- I ment, and, consequently, the cord 33 will also be moved. inwardly by reason of the guides 32, to the position indicated in'Fig. 3. A

pull now upon the cord 33, will serve to move the enlarged portion including the two spheres 37 downwardly, and this enlarged portion of the cord 33 will engage the outer ends 21 of the fork 20 and depress the same. In view of the fact that this fork really includes. one arm of the lever pivotally mounted intermediate its extremities, the opposite end which includes the latch 19, will "be moved upwardly, alsoindicated in Fig. 3,

and disengage from the keeper 6, making it possible for the door 2 to be swung open and rendering accessible the dumb-waiter 3.

It is to be appreciated that the spring 23 for the arm 22 is merely'provided in cases where the inward movement of the outer ends of the levers 25 would not prove suificient to cause positive engagement between theenlarged portions upon the cord 33,with

the prongs of the fork 20, as the buffer wheel 30 would be pressed inwardly and tend to slide the arm 22in a like direction against the action of the spring 23, if such arm should not be clamped to the casing 8. How- 'ever, it is to be understood that the inward prongs 21, it will be noted, are flared out-v wardly so as to serve as a guide for the cord should the latter become slightly displaced from aposition directly in front of the open end of the fork. I

To provide further adjustment I have devised a compound clamping member clearly shown in Figs. 4 and 5, which, as it v will be seen, allows any adjustment of the distance between the outer ends .of the latch 19 and fork 20, and the clamping member.

It will be appreciated that I may vary and modify my structure in any number of ways without departing from the scope of my,

, claims.

I claim- 1. A lock in combination with a door, a

keeper secured to the inner face of such door, a latch arm engaging the keeper, a fork connected to such latch and extending in an opposite direction therefrom, such latch and fork being pivotally mounted at their point of connection, and means for engaging the fork for depressingthe same, where by to elevate the latch, said means including a cord, formed with an enlarged portion, adapted to engage the forkupon a pull being exerted upon the cord.

2. A look in combination with adoor, a keeper secured to the inner faceof such door, a latch arm engaging theke'eper a fork connected to such latch and extending in an opposite direction therefrom, such latch and fork being pivotally mounted at their point of connection, means for engaging the fork for depressing the same, whereby to elevate the latch, said means including a cord, formed with an enlarged portion, adapted to engage the fork upon a pull being exerted upon the cord, and means for moving the cord toward the fork.

3. A lock in combination with a door, a

keeper, secured to the inner face of such;

door, a latch arm engaging the keeper, a fork connected to such latch and extending in an opposite direction therefrom, such latch and fork being pivotallyv mounted at their point of connection,means for engaging the fork for depressing the same, whereby to elevate the latch, such means including a cord, formed with; an enlarged portion, adapted to engage the fork upon a pull being exerted upon the -cord, and means normally holding'the enlarged portion in a posi- 5. A lock in combination with a door,

keeper secured to the inner face of such door, a latch and a fork connected together and pivotally mounted at their point of connection, a cord, formed with an enlarged portion, capable of engaging such fork to disengage the latch from the keeper but normally out of engagement with the same,

means for moving such cord inwardly, in- 4 eluding a pair of levers capable of being rocked inwardly, guides secured to the outer ends of such levers, through which guides the cord passes, and means for rocking such levers. V

ERNST E. L. MONTELIUS. 

